And since water is an efficient conductor of electricity, grounding is extremely important in a swimming pool or spa. Grounding can also prevent the risk of fire and equipment failure due to electric surges.
When an electric system or piece of equipment is grounded, it is electrically attached to the earth, which has the lowest electric potential. In the event of a short, the circuit breaker is tripped and the equipment turns off. This also cuts the electric current, preventing the threat of electric shock.
Each state has its own rules for grounding swimming pools, and the National Electric Code (NEC) offers very clear stipulations for a pools electrical system, including grounding. To ensure that grounding is complete, use the correct wire size, along with clamps or lugs designed for this purpose.
Bonding is not the same as grounding. However, the bonding process is also important and can be implemented at the same time as the grounding process. Grounding and bonding should be put into place by a licensed, professional electrician.